Spring structure.



O. R. HUNT.

SPRING STRUCTURE.

APPLICATION FILED DEO.30, 1912.

1 085 426 Patented Jan. 27, 1914.

026% ii. M

OZELLO R. HUNT, OF CHICAGO, ILLINOIS.

SPRING STRUCTURE.

Specification of Letters Patent.

Patented Jan. 27,1914.

Application filed December 80, 1912. Serial No. 739,324.

To all whom it may concern Be it known that I, OZELLO R. HUNT, a citizen of the United States, residing at Chicago, in the county of Cook and btate of Illinois, have invented a new and useful Improvement in Spring Structures, of which the following is a specification.

This invention relates particularly to spring structures in which upholstery springs are employed; and the primary object of the invention is to provide an improved spring structure employing an improved device for uniting, or tying together, the medial portions of such springs.

The invention is illustrated in its preferred embodiment in the accompanying drawing, in which- Figure 1 represents a broken vertical sectional view of a spring structure embodying my invention; Fig. 2, a broken sectional view taken as indicated at line 2 of Fig. 1; Fig. 3, a broken vertical section taken as indicated at line 3 of Fig. 1; and Fig. 4, a broken elevational view showing the medial portion of one of the springs of the structure.

The structure shown comprises upholstery springs A, A, of general hour-glass form. These upholstering springs may have their lower end-rings secured to or mounted on a base-frame 2 in the usual manner, it being understood that the springs are preferably arranged in longitudinal and transverse rows and that the marginal rows are connected with marginal rods 3. The upper end-rings 1 of the coils need not be specially tied, unless desired, as they will be sutliciently connected by the mattress or cushion (not shown) which will be placed upon the spring structure. 1 of the outer or marginal rows are connected with the marginal rod 3*.

Each spring is formed with a series of close-wound central convolutions; and the springs are united medially by means of bars 5 which extend in one direction and rods 6 which extend at right angles thereto. The bars 5 may comprise light-weight metal strips which are disposed in a horizontal plane and have portions F twisted or turned so as to lie in vertical planes. The portions 5 are spaced to correspond with the spacing of the coils and are of sufiicient length to fit snugly within the coils 4. The twisted portions 5 have their upper edges provided The end-rings with central notches 5 which receive the upwardly-struck portions 6 of the wires 6. The twisting of the portions 5 with respect to the other portions of the bars 5 affords a slope or bevel 5 at each corner of the portions 5 These slopes or bevels facilitate the assembling operation, in which operation the spring is so turned that the portion 5" will enter between the planes of two of the coils 4, after which the spring may be turned with relation to the strip 5, and the wire 6 may then be introduced between the same coils of the spring and snapped into the notch 5*. It will be noted that in entering the connecting bars and rods. or wires, the central coils of the springs are forced apart, from which it will be understood that the coils of the springs will act resiliently to maintain the bars and cross-rods in proper relation and in interlocking engagement with each other and with the central coils of the springs.

The construction described is simple, cheap and durable. The facility with which the assembling operation is performed reduces to a minimum the cost of manufacture, while the security of the connection improves the quality and durability of the spring structure.

he improved structure is especially desirable for automobile seats, but may be advantageously employed in chairs, couches, bed-springs and other constructions.

The foregoing detailed description has been given for clearness of understanding only, and no undue limitation should be understood therefrom.

WVhat I regard as new cure by Letters Patent, is:

1. In a spring-structure, the combination with upholstery springs, of a connecting device comprising bars having twisted por tions entered between convolutions of the coils, the twisted portions of said bars lying in a plane vertical to that of the convolutions of such coils, and cross-rods entered between convolutions of the coils and engaging the twisted portions of said bars.

2. In a spring structure, the combination with upholstery springs, of connecting devices comprising bars disposed in horizontal planes and having at intervals p0rtions disposed in vertical planes, said bars entered between the close-wound convolutions and having said vertical portions disposed within said convolutions, and crossand desire to setal planes and having twisted o fi-set portions, said crossrods entered between said their ofi'sets engaging the edges of the vertical portions of said bars.

3. In ,a spring structure, the combination with upholstery springs, of connecting devices comprising bars disposed in horizonportions lying in vertical planes, said bars entered between said convolutions and said vertical portions lyingl within said convolutions and provided wit edge-notches, and cross-rods entered between said convolutions and having ofiset portions engaging said notches.

4. In a spring structure, the combination with upholstery springs, of connecting devices comprising bars disposed in horizontal planes and having twisted portions. affording parts lying in vertical planes, and beveled edges joining vertical parts, whereby the bars may be introduced between the convolutions by a. turning'nction, said vertical parts lying within said convolutions and provided with edge-notches, and cross-rods entered presence of L. HEIs'LAR, J. G. ANDERSON.

the horizontal and 20 be- 25 tween said convolutions and having ofi'set 

